Harman Kardon SUB-TS18, Service Manual

Page: 16 / 28

SUB-TS18 (UL) AMP
Troubleshooting Flow Chart
no
yes
yes
yes no
yes
yes
LED red
LED light green
yes yes
no
yes yes no
no
yes yes
no
yes yes
yes
no
yes
yes
AMP no signal out
Dc voltage check ±Vcc
Check+/-15VDC
LED light green or red
Check Fuse,Transformer,
D501, etc
Check RY101,D110,Q112,Q113 etc
Check CLASS 150W
MODEL
Check ,+VCC& -VCC
DC voltage
Check Q107,Q108,Q109 etc
Check Q501.Q502.Q503,D502 etc
Check,Q206,Q207,U203 etc
Check U202 pin8 signal
Check U201
pin1 signal
Test R147 signal
Check M100 signal The Amp ass
’
Y OK, END
CheckU201,U202,VR201
etc
Check limiter Circuit C317
Check U301,R343,R344 ,
C340,Q301,Q302, etc
Check TH1
15
SUB-TS18
harman/kardon